20131568

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1009}}^1$

素因数の和:1089

約数の個数: 40

約数和(自身を含む): 41329200

約数和(自身を除く): 21197632

約数列:

[1, 2, 4, 8, 16, 29, 43, 58, 86, 116, 172, 232, 344, 464, 688, 1009, 1247, 2018, 2494, 4036, 4988, 8072, 9976, 16144, 19952, 29261, 43387, 58522, 86774, 117044, 173548, 234088, 347096, 468176, 694192, 1258223, 2516446, 5032892, 10065784, 20131568]

約数ペア:

[(1, 20131568), (2, 10065784), (4, 5032892), (8, 2516446), (16, 1258223), (29, 694192), (43, 468176), (58, 347096), (86, 234088), (116, 173548), (172, 117044), (232, 86774), (344, 58522), (464, 43387), (688, 29261), (1009, 19952), (1247, 16144), (2018, 9976), (2494, 8072), (4036, 4988)]